re PR c++/38877 (Revision 143404 caused ICE on 447.dealII in SPEC CPU 2006)

        PR c++/38877
        * tree.c (lvalue_p_1): Allow non-fields in COMPONENT_REF.
        * init.c (build_new): Don't call describable_type unless we
        have an auto.

From-SVN: r143446

4 files changed, 43 insertions, 6 deletions

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index ff0de59..a58d4ac 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,5 +1,10 @@
 2009-01-16  Jason Merrill  <jason@redhat.com>
 
+	PR c++/38877
+	* tree.c (lvalue_p_1): Allow non-fields in COMPONENT_REF.
+	* init.c (build_new): Don't call describable_type unless we
+	have an auto.
+
 	PR c++/29470
 	* pt.c (tsubst_decl) [USING_DECL]: Propagate access flags.
 
diff --git a/gcc/cp/init.c b/gcc/cp/init.c
index 1285f16..f2b79f1 100644
--- a/gcc/cp/init.c
+++ b/gcc/cp/init.c
@@ -2334,11 +2334,10 @@ build_new (tree placement, tree type, tree nelts, tree init,
   orig_nelts = nelts;
   orig_init = init;
 
-  if (nelts == NULL_TREE && init != void_zero_node && list_length (init) == 1
-      && describable_type (TREE_VALUE (init)))
+  if (nelts == NULL_TREE && init != void_zero_node && list_length (init) == 1)
     {
       tree auto_node = type_uses_auto (type);
-      if (auto_node)
+      if (auto_node && describable_type (TREE_VALUE (init)))
 	type = do_auto_deduction (type, TREE_VALUE (init), auto_node);
     }
 
diff --git a/gcc/cp/tree.c b/gcc/cp/tree.c
index 3347bfb..04fc7e9 100644
--- a/gcc/cp/tree.c
+++ b/gcc/cp/tree.c
@@ -114,9 +114,11 @@ lvalue_p_1 (tree ref,
 	;
       else if (is_overloaded_fn (TREE_OPERAND (ref, 1)))
 	/* The "field" can be a FUNCTION_DECL or an OVERLOAD in some
-	   situations.  */
-	op1_lvalue_kind = lvalue_p_1 (TREE_OPERAND (ref, 1),
-				      treat_class_rvalues_as_lvalues);
+	   situations.  If we're seeing a COMPONENT_REF, it's a non-static
+	   member, so it isn't an lvalue. */
+	op1_lvalue_kind = clk_none;
+      else if (TREE_CODE (TREE_OPERAND (ref, 1)) != FIELD_DECL)
+	/* This can be IDENTIFIER_NODE in a template.  */;
       else if (DECL_C_BIT_FIELD (TREE_OPERAND (ref, 1)))
 	{
 	  /* Clear the ordinary bit.  If this object was a class
diff --git a/gcc/testsuite/g++.dg/template/lvalue1.C b/gcc/testsuite/g++.dg/template/lvalue1.C
new file mode 100644
index 0000000..9def2a1
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/lvalue1.C
@@ -0,0 +1,31 @@
+// PR c++/38877
+
+template<class _T1, class _T2>
+struct pair
+{
+  typedef _T1 first_type;
+  typedef _T2 second_type;
+  _T1 first;
+  _T2 second;
+  pair () : first(), second() { }
+  pair(const _T1& __a, const _T2& __b)
+    : first(__a), second(__b) { }
+};
+
+template<class _T1, class _T2>
+inline pair<_T1, _T2>
+make_pair(_T1 __x, _T2 __y)
+{
+    return pair<_T1, _T2>(__x, __y);
+}
+
+template <int dim> class bar;
+
+template <int dim>
+pair<bar<dim> *, unsigned int>
+foo (unsigned int position)
+{  
+      const pair<int,unsigned int> tmp;
+      return make_pair (new bar<dim>(tmp.first),
+                             position);
+ }